Fuel-feeding apparatus



June 18, 1929. w, CROW ET AL 1,718,032

FUEL FEEDING APPARATUS Filed Aug. 23. 1920 5 Sheets-Sheet l I IMMGN/ Q affozueu June 18, 1929. w. CROW ET AL 1,718,032

FUEL FEEDING APPARATUS Filed Aug. 23 1 20 5 Sheets-Sheet 2 affozucu June 18, 1929. w. cRow ET AL FUEL FEEDING APPARATUS I Filed Aug. 23. 1920' 5 Sheets-Sheet 3 Patented as. 118, 1929.

; "UN T DTTSIA T scnArrEn'romomEzr-m COMPANY, 02 rrrrsB Itdn,.I' ENNsY vAm,-1 con- :eoRA'rIoiv OF rENNsYL-vaNm.

' y; rustramme srr'aas'rins.

' Y Application arcin 23, 1920. surefire. 405393;.

Fig.1 is an elevation of an'embodiment of the invention in'a stoker, for furnaces,

with an electriemotor drive, parts being broken away; I w Fig.2 is a planvie'w, with parts broken away, of the apparatus-of Fig. 1; Fig. 3 'is'an end view offt-heapparatus of Fig. 1 with" the delivery conduit omitted; Fig; 4 is a-plan view, with parts'broken Laway, of the deliveryway of the apparatus;

Fig. 5 is. a fragmentary view. of-.- .the 'crusher; Fig. 6 is partial vertical section of the apparatus of: ig. 1 the motorbe ng shown in elevation; r

F ig.;7 is a View," partially insection, of

the adjustable eccentric of the appanatus for effecting the hopperdrive;

. Fig. 8' is. section of the eccentric,';on.an

- enlar ed "scaleon the line VllIf-VIII,

so Fig.9 is a-detail viewshowin the shpi page connection in the holdingo the eccentric adjustment;and f g r Fig. I) is areduced scale fragmentary showing of an installation hereunder. 3 Mounted on the base or bracket -1 as the eneral platform oi-support is a motor '2 having s aft 3 carryingta'Bprocket wheelQ from which extends, 'a-jsprocket chain '5 to sprocket wheel. 6 on counter-shaft- '7 ,'1 l1e 4o remote end of this shaft 7 ca'rr1es a pinion 8 in mesh with a-gear wheel9 as a, speed reduction drive for shaft 10.- he remote end of this fshaftf 10 has mounted thereon a sleeve 11 carrying a recessed meme ber 12 Fig. 8), which is connected by bolts 13 to a ace-plate 14. There is thus mounted about this eccentric housing 12 an eccentric stra 15 having bronze bearing 16 between sai strap 15 and this 'eccentric'housing 12, 14.. a

This eccentric strap 15' has a pair of-arms 17 (F ig. 1)"as a fork therefrom, each arm being connected to an-arm 18 mounted'on a 'shft 19, the' arms'18 being fixedto form ositive angle levers. with upstanding arms 20.

mally held by spring 22 in mesh with ratchet wheel- 23 as a slow speed drive for pinion 24 in mesh-with gear 25 on the shaft 26 through hopper 2 7 of the main housing or -frame28. 1

. This intermittent or slow speed drive devlce 'or speed, reduction mechanism from this shaft 10 effects a fuel supply to the ap- ;paratus', for-on this shaft 26 1s a conveyor shown oflthe screwtype. This conveyor in the region below the hopper 27 has a small diameter portion 28 for the slower feeding of the; fuel. This small diameter portion 1.28',' being inconnection with a larger diam eter portion 29, disposed abovehousing 30,

snir NT; OFFICE-6 'WALLER caow AND JOHN C; scnnrm, or r'rr r snuneir;rnmvsirnvsnm,.assmnoas- These upstanding-arms 20.carry a ratchet 2 1 pivotally connected therebetween and nor-' discharges material-into crusher housing 31 \as well-asrelievesthe conve or portion 28 for'jrnore free 0 ration; n'this housing port1on"31, on tie, shaft 10, is disposed a utoqthgad'crhsher wheel .32, which in its rota-' -tion, [will grind or draw the coal between thisfl wheel and lugs. 33 in the. housing,

'. therebycru shing or. grinding the coal to a .uniformsize-in the-deliveryof such fuel as by way of chuteM into the housing section L 35 therebelow. Of course there may be some fines with this coal; but the crusher will "break itdownv tQ-JlOt exceed a certain diamv eter for which the crusher is set or designed.

- l this housing portion 35, mounted on the i I shaft 7, whichis of greater'speed of rota- .tiontlian the shaft 10, is a'series ofconcaved blades 36,' which, in thedirection of rotation, cupfor concave into the. descending fuel and therebyengagesu'ch fuel for throwing it ally.- This high speed rotary fan'- tangenti 'ropeller or 'ejectorma provide for deliver- 1 mg wlth'the fuel a final, as air; in addition to scattering the fuel. Besides this intake 0' ning] 34; r the fuelrthere isdisposed in t e hou'sin into vhic .may -be regulated by pivoted cover 38 so that there may a pumping or dr'awing in of air and throwing of suchair and-fuel into narrowed portion 39 of the discharge way' to which the housing- 35 delivers. i p I Acceleratin means with fluid-may further 35-an intake opening 37, the flow be'used'inmec anically accelerating the fuel and serving asafluid'floor for supporting H the. fuel. ag'by steam or air jets 40in the i therefrom hyrway of 'pipe'l'. I

I housing a.,f$1j;gia1 alongxthe floor of t e way 39- supplemented in nozzle clearing ,action'by 'an jadditional- "downwardly directe --ini aapper are 1 When stea in djthesejfiuid accelerators also may the proper combustion v of the fuel, whilejof course, with air, the ox)" genalso willgassistr'"' I 1 ma dis ers eje ifi a there is -alwidenmg section or delireryportlon -12 .;te1 1l1lntltll'1g -m an upwardly flaring portion 43 having dispersing ribs 44 there r in. Thisffiaring terminus of this discharge "15 waymay ;be water cooled as by supply of ,water from pipe 45 into the chamber 46 for the control. of the temperature I and flow As hereindiscloscd there is but one speed reduction tothc' first or, high speed shaft 7 'whichhandles the fan or high speed ejector" v delivery ofthe'rotary fan. There is another speed reduction to the shaft 10' which" drives the crusher and still travels'at a high rate of l: speed; 'xSothese two high speed shafts effect r; anhandling-of:the"fuel"in the Stoker, fuel ."rhandlenfirfiuel fe ding"apparatus.

5'.,.- I -he =,slow;speed-driveyisgon the shaft 26 f through-tithe}hopper f 27 and the provision gets clogged Ainthe housing,: the machine will automaticallystop-without any damage to .the apparatusr "To this end the sleeve llon jthe shaft ioito which 'it is connected, carries the eccentric housing '12,;14. Eccentrically' on this-sleeve 11' is a wrist pin 48. On this I 4o pin 48'is'a coinp'ound member in the form of I j a sleeve-haring-a'bearin 49 (Fig. 9) for the ,r mem; Justini ard' rom this hearing is ga''toothe'dwwheeh50 andtherefrom is a in pered friction portion or frusto-conical sec- 1 tion "51. .This iswithinthe housing formed by. the'eccentri'c.members l2, 1- Mountedin 'T the housing 12, 14; is a pin 52, having thereon a tooth wheel 53 in; mesh with the wheel 50, a'nd rotatable about the structure 49, 50,

' 0 51 ineifectingan eccentric adjustment 0 this eccentric housing 12, "14, with respect to the eccentrieivrist pin4=8 disposed as a crank with respect totheslceve portion-11 on the shaft '10.. \Vhen the desired position of ec-' centricity' orfladjustment is ieterinincd for thereby regulating the fall ot'the dog 22onto the ratchet wheelg 23, there anay .be locking.

or frictional holding in this adjustmen tfihy 11s pin 54 has'threa ed portion-33, in'thedious 12, '14, on .which' threaded portion 15' means of pin 54; )arallel to'thc pin52.

j mounted a frictional shoe 56; Accordingly in rotating this pin 54 thethreaded portion 'may squeeze or urge this shoe'56 JIltO gripping relation with-the tapered portion Lil 18,63?

fthisliousing' port1on 39',

\ hereinflssuchithatin this intci'n'iittcnt slow"v -speedtdriyii fdevice';for;;thezhopper, in event any fmaterial'should come-.into-the machine that-"cannotbe; handled as to conveying or 51 or the salient-e49, 5'0, 51. 1 This structure;

is now locking or binding ofth'e eccentric adjustment for in so adjusting there is ef-"-' feeder, such material may .run from very l terminingjust how coarse the coarser partl -f cles may be, but they may he keptdown .to a

ratus. The lll'lll'fll'dl -y extendingportion of Q 1 the delivery terminus of the way effects such ,7

is a. large percentagejof then fuel whichis]: Jgnlted on entrance. \V

tended that there is complete combustion inf;v

"coarse to fine and there may be grading deimaximum by the action otthe crusher appa-v e a'spreading oi the fuel that in practice there hile itis not con entrance owing to the, size of the fuel parti-r 5 suspended, theren 'tion and effecting such distributionrof heat throughout the entire furnace chamber that it renders the operation of thisistoker very-'.' unif'm-m and etiicient for fuel burning espejf cially in areasot a large extentaway froni f such StOkQIS. i

,-In adjusting the throw. of the; eccentric by rotating the housing- 12, 14, aboutfthev wrist pin -18, the degree-0t adjustmcntmafl; 10ov v the end of thesleeve portion 49in adjust+ I ment as loan index-58 onthe eccentric he quicklv' determined by graduations 57 on clcs which are deli\'cred,-tliere effected a5. j' 9 complete lgmtionof the material 'while it is j v expediting the .combus-'--oo front plate housing l-l. This adjustment of the sli'ppahlc eccentric connectionof the ec-ijl I 10.1"

centric may vary the speed of travel of the com-cyorainl in-themstance that the conveyor is clogged, the-eccentric slips on its ad j nstment hack toconcentric positionwh le allowing the crusher and ejector tout um?- along, notwithstanding the stepped, and the machine'may be immedl ately givcn attention bythrowing out the any damageto the apparatus.

motor and corrcctin the ditliculty without I Instead of merely circulating the coolingjllii "medium inthe chamber, plugs59. mayhave I jet openings (30 for the discharge of avaporsheet of steam' 'for' slowing up combustion of the finer ,fucl particles 'as well as provid-. ing combustion supporting means of some slight gas producer attributes. However, in furnace 61, beds '62 of the coarser fuel fi particles on grate G3, cmits gas similarlyvto a true gas producer; The ignition of such gas is thus efi'cctire for an extend dreglon of flame propagation. This apparatus} is thus effective for an extended region of flame v. propagation.

temperature with complete combustion 13 hopper is no i "As the combustion is thus spread out there is a reduced peak I i i from the jets 64, from t throughout an enlarged region of heat distribution. This heat of combustion is humidified by steam supply through the grates e stoker or ignition jets 40, 41, and even these may be supplemented as may be found desirable in practice for special operations by jets 65 in the furnace 61. \Vhen used for rotary kiln operations, an initial temperature of eighteen hundred degrees to twenty-six hundred degrees Fahrenheit may be maintained with the heat so thoroughly used as to have the spent gases leave the remote end at one hundred seventy-live feet away at a temperature of from four hundred fifty to five hundred fifty degrees Fahrenheit \Vhat is claimed zand it is desired -to secure by Letters Patent is 1. A fuel feeder embodying a delivery way, rotary impeller means having its axis transverse of said way and effective for projecting material tangentially-of the impeller means through said way at a high velocity, said means having a way delivery side and and an idle return side, and an air inlet duct to the impeller means cooperating with the impeller means in the idle return sideonly of the impeller means as a suction release, and means supplementing the impelling the material in said way from said impeller means including fluid jet/means adjacent the impeller means directed along said way and effective for giving an increased speed to the fuel as thrown by the impeller means.

2. A fiiel feeder embodying a delivery way having a discharge, rotary impeller :means having its axis transverse of said way and effective for projecting material tangentially of the impeller means through said way underspeed as imparted by said impeller means and having a way delivery side and an idle return side, an air inlet duct to the impeller means as a suction release in the idle return side onlyaof the impeller meahs,

and additional inlet means for imparting additional speed tothe traveling fuel in said way, said means being directed downwardly and forwardly into the material in said way for providing a draught of fluid impingin against the bottom of and along over said way toward said discharge.' a

In witness whereof we aflix our signatures.

WALLER CROW. JOHN C SCHAFFER. 

